This sweet, nutty liqueur is inspired by the one made at London's American Bar at The Savoy, where it's made with a sous vide technique. You'll need resealable plastic bags and a few large clips (such as binder clips) to mimic the effect. Try a splash in a classic whiskey cocktail or in a mixed drink with ginger beer or ale, enjoy the spirit on its own, or drizzle it over cake or ice cream.
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